Visual Check - Mitsubishi Melsec-L Series User Manual

8.2

Visual Check

Check the following:
(1) Checking LEDs of the master station
Check that no error occurs in the master module using LEDs by the following procedure.
For LED indication and module status, refer to
1.
Power on the system and check the RUN LED of the master station.
If the RUN LED does not turn on, troubleshoot with reference to the following.
Page 55, Section 8.3.1
2.
Check the L RUN LED of the master station.
If the L RUN LED of the master station does not turn on, troubleshoot with reference to the following.
Page 55, Section 8.3.2
3.
Check the ERR. LED of the master station.
If the ERR. LED of the master station is on or flashing, troubleshoot with reference to the following.
Page 56, Section 8.3.3
4.
Check the L ERR. LED of the master station.
If the L ERR. LED of the master station is on or flashing, troubleshoot with reference to the following.
Page 57, Section 8.3.4
(2) Checking LEDs of a remote I/O station
Check that no error occurs in a remote I/O station using LEDs by the following procedure.
For troubleshooting of a remote device station, refer to the user's manual for the remote device station used.
1.
Check the PW LED of the remote I/O station.
If the PW LED of the remote I/O station does not turn on, troubleshoot with reference to the following.
Page 59, Section 8.4.1
2.
Check the L RUN LED of the remote I/O station.
If the L RUN LED of the remote I/O station does not turn on, troubleshoot with reference to the following.
Page 60, Section 8.4.2
3.
Check the L ERR. LED of the remote I/O station.
If the L ERR. LED of the remote I/O station is on or flashing, troubleshoot with reference to the following.
Page 60, Section 8.4.3
(3) Checking communication cables and wiring
Check that no error occurs in the communication cables, the connectors and terminating resistors are securely
connected, and the system is correctly wired. (
54
Page 15, CHAPTER 2.
Page 36, Section 6.3)